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A compact 340 GHz 2x4 patch array with integrated subharmonic gilber core mixer as a building block for multi-pixel imaging frontends

Yogesh B. Karandikar (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Herbert Zirath (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Yu Yan (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Vessen Vassilev (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik)
Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC (1550-8781). (2014)
[Konferensbidrag, refereegranskat]

For linear multi-pixel imaging systems, a linear stack of pixels comprising of an antenna and a heterodyne receiver are needed. Such pixels can be realized using MMIC processes. The main constraint for such multi-pixel system is a compact array of pixels giving high coupling to quasi-optics used for focusing. This paper addresses this trade-off and presents a novel solution based on beam synthesis of two consecutive subarrays. One such sub-array along with heterodyne receiver is described as half-pixel in this paper and it is realized using 2x4 patch array and Gilbert core sub-harmonic mixer using a 250nm DHBT process. The patch array has ohmic loss better than 8 dB and mixer conversion loss is 6-8 dB over 320-350 GHz RF band. The chip size is 1mm x 2mm and therefore for 7 simultaneous beams a MMIC of 8 half-pixels is foreseen.

Nyckelord: Gaussian Coupling, Gilbert Core, HBT, Patch Array, Sub-Harmonic Mixer



Denna post skapades 2015-01-14. Senast ändrad 2015-08-10.
CPL Pubid: 210704

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur